diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-11-29 16:31:51 -0400 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-12-02 11:52:03 -0400 |
| commit | a4d1f91db5021c57e14721ac090616c90386ac70 (patch) | |
| tree | 9c589738a6d193c2ddabe40b6b93412c0932e5c2 /include/linux/vfio.h | |
| parent | 2a3dab19a0a6c1823645764188776f271de1b3cf (diff) | |
vfio-iommufd: Support iommufd for physical VFIO devices
This creates the iommufd_device for the physical VFIO drivers. These are
all the drivers that are calling vfio_register_group_dev() and expect the
type1 code to setup a real iommu_domain against their parent struct
device.
The design gives the driver a choice in how it gets connected to iommufd
by providing bind_iommufd/unbind_iommufd/attach_ioas callbacks to
implement as required. The core code provides three default callbacks for
physical mode using a real iommu_domain. This is suitable for drivers
using vfio_register_group_dev()
Link: https://lore.kernel.org/r/6-v4-42cd2eb0e3eb+335a-vfio_iommufd_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Lixiao Yang <lixiao.yang@intel.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yu He <yu.he@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index e7cebeb875dd..a7fc4d747dc2 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -17,6 +17,8 @@ #include <linux/iova_bitmap.h> struct kvm; +struct iommufd_ctx; +struct iommufd_device; /* * VFIO devices can be placed in a set, this allows all devices to share this @@ -54,6 +56,10 @@ struct vfio_device { struct completion comp; struct list_head group_next; struct list_head iommu_entry; +#if IS_ENABLED(CONFIG_IOMMUFD) + struct iommufd_device *iommufd_device; + bool iommufd_attached; +#endif }; /** @@ -80,6 +86,10 @@ struct vfio_device_ops { char *name; int (*init)(struct vfio_device *vdev); void (*release)(struct vfio_device *vdev); + int (*bind_iommufd)(struct vfio_device *vdev, + struct iommufd_ctx *ictx, u32 *out_device_id); + void (*unbind_iommufd)(struct vfio_device *vdev); + int (*attach_ioas)(struct vfio_device *vdev, u32 *pt_id); int (*open_device)(struct vfio_device *vdev); void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, @@ -96,6 +106,21 @@ struct vfio_device_ops { void __user *arg, size_t argsz); }; +#if IS_ENABLED(CONFIG_IOMMUFD) +int vfio_iommufd_physical_bind(struct vfio_device *vdev, + struct iommufd_ctx *ictx, u32 *out_device_id); +void vfio_iommufd_physical_unbind(struct vfio_device *vdev); +int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id); +#else +#define vfio_iommufd_physical_bind \ + ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ + u32 *out_device_id)) NULL) +#define vfio_iommufd_physical_unbind \ + ((void (*)(struct vfio_device *vdev)) NULL) +#define vfio_iommufd_physical_attach_ioas \ + ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) +#endif + /** * @migration_set_state: Optional callback to change the migration state for * devices that support migration. It's mandatory for |